Promicrocerads planicosta (Sowerby)
Perfect 3D Ammonite with all the original white shell preserved. On black limestone. From the famous 'Ammonite Marble' beds at Marston Magna. Very 'cute 'and attractive.
Jurassic, Upper Sinemurian, obtusum Zone,'Ammonite Marble'.
Marston Magna near Yeovil, Somerset.
Ammonite : 1.2 cm diam.
